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General| Bands | FM, AM, LW, SW |
|---|---|
| FM Frequency Range | 87.5 - 108 MHz |
| AM Frequency Range | 520 - 1710 kHz |
| Memory Presets/Channels | 45 |
| Display | LCD |
| Clock | Yes |
| Alarm | Yes |
| Sleep Timer | Yes |
| Speaker | Built-in |
| Headphone Jack | Yes |
| Cassette Recorder | No |
| Type | Portable |
| Frequency Range | FM: 87.5-108 MHz, AM: 520-1710 kHz |
| Tuning Steps | FM: 50 kHz |
| Modulation Modes | AM, FM |
| Tuning Modes | Manual, Auto |
| Power Source | 4 x AA batteries |
| Antenna | Telescopic |
| Sensitivity | FM: 3 µV |
| Selectivity | FM: 30 dB |
| Signal-to-Noise Ratio | AM: 40 dB |
Detailed performance parameters for the FM reception mode.
Performance metrics for the Long Wave reception band.
Technical specifications for the Medium Wave reception band.
Performance parameters related to the cassette tape player functionality.
Detailed technical specifications for the Short Wave reception band.
Steps to safely remove the rear cover of the device.
Instructions for detaching the main printed circuit board.
Procedure for removing the control printed circuit board.
Steps to calibrate the internal clock for timekeeping accuracy.
Procedure to align the Phase-Locked Loop for accurate frequency tuning.
Adjustment for the second local oscillator in AM reception.
Tuning the Intermediate Frequency stage for AM reception.
Alignment of the Intermediate Frequency circuit for FM reception.
Adjusting the receiver for optimal AM signal reception sensitivity.
Optimizing the receiver for best FM signal reception.
Alignment procedure for the FM Multiplex (MPX) stereo decoder.
Calibrating the battery level indicator display.
Tuning the 450kHz trap circuit for optimal performance.
Adjusting the signal strength meter for accurate readings.
Adjustment of the Beat Frequency Oscillator for SSB reception.
Calibrating the FM auto-stop function for precision.
Adjusting the tape head for optimal audio playback alignment.
Calibrating the motor speed for accurate tape playback.
Diagrams showing pin configurations for various transistors.
Visual guides for identifying common diode types and polarity.
Table listing voltage readings for specific IC pins under test conditions.
Table showing voltage measurements for transistor terminals during operation.
Functional block diagram for IC1.
Block diagram for the microcontroller IC2.
Logic diagram for IC3.
Detailed electronic schematic of the ATS-818CS receiver.
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